Investigating the role of Cu, Zr and V on the evolution of microstructure and properties of Al-Si-Mg cast alloys

Zhang, Mingshan; Liu, Keli; Han, Jiaqiang; Qian, Feng; Wang, Junsheng; Guan, Shaokang

doi:10.1016/j.mtcomm.2021.102055

Cited by 16 publications

(3 citation statements)

References 36 publications

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“…In addition to the formation of Mg 2 Si phase and Al 2 Cu phase, Q-Al 5 Cu 2 Mg 8 Si 6 phase is also formed during the solidification. The Q phase is distributed independently of script morphology, or coexists with Al 2 Cu and eutectic Si in the final solidification stage to form eutectic morphology [ 81 ]. The Q phase may dissolve or not dissolve or even precipitate during the solid solution process, and its dissolution characteristics are related to alloy composition [ 82 ].…”

Section: Heat Treatment Process Optimizationmentioning

confidence: 99%

Research Progress on Multi-Component Alloying and Heat Treatment of High Strength and Toughness Al–Si–Cu–Mg Cast Aluminum Alloys

et al. 2023

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Al–Si–Cu–Mg cast aluminum alloys have important applications in automobile lightweight due to their advantages such as high strength-to-weight ratio, good heat resistance and excellent casting performance. With the increasing demand for strength and toughness of automotive parts, the development of high strength and toughness Al–Si–Cu–Mg cast aluminum alloys is one of the effective measures to promote the application of cast aluminum alloys in the automotive industry. In this paper, the research progress of improving the strength and toughness of Al–Si–Cu–Mg cast aluminum alloys was described from the aspects of multi-component alloying and heat treatment based on the strengthening mechanism of Al–Si–Cu–Mg cast aluminum alloys. Finally, the development prospects of automotive lightweight Al–Si–Cu–Mg cast aluminum alloys is presented.

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Section: Heat Treatment Process Optimizationmentioning

confidence: 99%

Research Progress on Multi-Component Alloying and Heat Treatment of High Strength and Toughness Al–Si–Cu–Mg Cast Aluminum Alloys

et al. 2023

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“…The metamorphic effect of La on eutectic Si originates from the many fine, diffuselydistributed RE elements, where La atoms accumulate in concave valleys, causing lattice distortion and reducing the growth rate of eutectic Si in that direction while changing the original growth pattern of eutectic Si, resulting in the refinement of the eutectic Si from initially massive or needle-like to fibrous or granular [34][35][36]. The metamorphic effect of La on eutectic Si originates from the many fine, diffuselydistributed RE elements, where La atoms accumulate in concave valleys, causing lattice distortion and reducing the growth rate of eutectic Si in that direction while changing the original growth pattern of eutectic Si, resulting in the refinement of the eutectic Si from initially massive or needle-like to fibrous or granular [34][35][36].…”

Section: Morphology and Size Statistics Of Eutectic Simentioning

confidence: 99%

Quantifying the Effects of Grain Refiners Al-Ti-B and La on the Microstructure and Mechanical Properties of W319 Alloy

Liu

Wang

et al. 2022

Metals

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It is well known that the microstructure distribution in recycled Al-Si alloys has a large impact on the final mechanical properties. In this study, the microstructure, including Fe-rich intermetallics and microporosity, was quantitatively adjusted using multi-scale characterization with microalloying rare earth elements and traditional grain refiners as the objects of study. It was found that the addition of Al-Ti-B to W319 recycled aluminum alloy reduces the microstructure size and Fe-rich intermetallics, while the addition of La facilitates the transformation of harmful β-Fe into less harmful particles and the densification of coarse eutectic Si, promoting the refining effects on the microstructure additionally. Therefore, the RE and Al-Ti-B master alloy could be a potential new grain refining agent, especially for Al-cast alloys when the ductility is critical for designing. The improvement in elongation far exceeds the original level, up to 69.6%, while maintaining the same level of strength or even better. At the same time, the excessive addition of La may lead to the depletion of Cu and Ti elements during heat treatment, degrading ductility and strength.

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“…Due to its excellent castability, wear resistance, low cost, and high specific strength, Al–Si alloys have been widely used in the fields of automobiles, mechanical appliances, electronic communications, and aerospace. [ 1–4 ] With the development of science and technology, higher requirements are put forward for the performances of Al–Si alloys to effectively alleviate energy consumption and environmental protection prospects. [ 5–7 ] Generally, alloying is the most frequently used method to optimize the composition of Al–Si alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on the Microstructure and Mechanical Properties of Al–9Si–0.4Mg–0.1Cu Alloy

et al. 2022

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Herein, effect of heat treatment on the microstructure and mechanical properties of a newly developed Al–9Si–0.4Mg–0.1Cu alloy treated by Al–6Sr–7La is investigated, and optimal T6 heat treatment process parameters are determined through optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) analysis, and quantitative statistics. The results show that the distribution of α‐Al is more uniform after T6 heat treatment (solution treated at 540 °C for 5 h and aged at 170 °C for 6 h) with eutectic silicon possessing fine grain and high roundness. Meanwhile, Al–6Sr–7La increases peak aging hardness and reduces peak aging time. During the under‐aging process, a large amount of Guinier Preston zone and a small amount of Mg5Si6 phase precipitate, which have strengthening effect on the alloy. At peak aging state, the coherent precipitated Mg5Si6 phase in α‐Al leads to the highest microhardness. Continuing to prolong aging time, the coherent relationship between metastable phase Mg5Si6 and the matrix is weakened, resulting in the decrease in microhardness. In addition, after T6 heat treatment, both tensile strength and elongation of the alloy are significantly improved and the reasons are discussed.

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Investigating the role of Cu, Zr and V on the evolution of microstructure and properties of Al-Si-Mg cast alloys

Cited by 16 publications

References 36 publications

Research Progress on Multi-Component Alloying and Heat Treatment of High Strength and Toughness Al–Si–Cu–Mg Cast Aluminum Alloys

Research Progress on Multi-Component Alloying and Heat Treatment of High Strength and Toughness Al–Si–Cu–Mg Cast Aluminum Alloys

Quantifying the Effects of Grain Refiners Al-Ti-B and La on the Microstructure and Mechanical Properties of W319 Alloy

Effect of Heat Treatment on the Microstructure and Mechanical Properties of Al–9Si–0.4Mg–0.1Cu Alloy

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